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                                <h2 id="&#x7269;&#x7406;&#x5185;&#x5B58;&#x63A2;&#x6D4B;">&#x7269;&#x7406;&#x5185;&#x5B58;&#x63A2;&#x6D4B;</h2>
<h3 id="&#x7269;&#x7406;&#x5185;&#x5B58;&#x7684;&#x76F8;&#x5173;&#x6982;&#x5FF5;">&#x7269;&#x7406;&#x5185;&#x5B58;&#x7684;&#x76F8;&#x5173;&#x6982;&#x5FF5;</h3>
<p>&#x6211;&#x4EEC;&#x77E5;&#x9053;&#xFF0C;&#x7269;&#x7406;&#x5730;&#x5740;&#x8BBF;&#x95EE;&#x7684;&#x901A;&#x5E38;&#x662F;&#x4E00;&#x7247; DRAM&#xFF0C;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x628A;&#x5B83;&#x770B;&#x6210;&#x4E00;&#x4E2A;&#x4EE5;&#x5B57;&#x8282;&#x4E3A;&#x5355;&#x4F4D;&#x7684;&#x5927;&#x6570;&#x7EC4;&#xFF0C;&#x901A;&#x8FC7;&#x7269;&#x7406;&#x5730;&#x5740;&#x627E;&#x5230;&#x5BF9;&#x5E94;&#x7684;&#x4F4D;&#x7F6E;&#x8FDB;&#x884C;&#x8BFB;&#x5199;&#x3002;&#x4F46;&#x662F;&#xFF0C;&#x7269;&#x7406;&#x5730;&#x5740;&#x5E76;&#x4E0D;&#x4EC5;&#x4EC5;&#x53EA;&#x80FD;&#x8BBF;&#x95EE; DRAM&#xFF0C;&#x4E5F;&#x53EF;&#x4EE5;&#x7528;&#x6765;&#x8BBF;&#x95EE;&#x5176;&#x4ED6;&#x7684;&#x5916;&#x8BBE;&#xFF0C;&#x56E0;&#x6B64;&#x4F60;&#x4E5F;&#x53EF;&#x4EE5;&#x8BA4;&#x4E3A; DRAM &#x4E5F;&#x7B97;&#x662F;&#x4E00;&#x79CD;&#x5916;&#x8BBE;&#xFF0C;&#x7269;&#x7406;&#x5730;&#x5740;&#x5219;&#x662F;&#x4E00;&#x4E2A;&#x5BF9;&#x53EF;&#x4EE5;&#x5B58;&#x50A8;&#x7684;&#x4ECB;&#x8D28;&#x7684;&#x4E00;&#x79CD;&#x62BD;&#x8C61;&#x3002;</p>
<p>&#x800C;&#x5982;&#x679C;&#x8BBF;&#x95EE;&#x5176;&#x4ED6;&#x5916;&#x8BBE;&#x8981;&#x4F7F;&#x7528;&#x4E0D;&#x540C;&#x7684;&#x6307;&#x4EE4;&#xFF08;&#x5982; x86 &#x5355;&#x72EC;&#x63D0;&#x4F9B;&#x4E86; <code>in</code> &#x548C; <code>out</code> &#x7B49;&#x6307;&#x4EE4;&#x6765;&#x8BBF;&#x95EE;&#x4E0D;&#x540C;&#x4E8E;&#x5185;&#x5B58;&#x7684; IO &#x5730;&#x5740;&#x7A7A;&#x95F4;&#xFF09;&#xFF0C;&#x4F1A;&#x6BD4;&#x8F83;&#x9EBB;&#x70E6;&#xFF1B;&#x4E8E;&#x662F;&#xFF0C;&#x5F88;&#x591A;&#x6307;&#x4EE4;&#x96C6;&#x67B6;&#x6784;&#xFF08;&#x5982; RISC-V&#x3001;ARM &#x548C; MIPS &#x7B49;&#xFF09;&#x901A;&#x8FC7; MMIO&#xFF08;Memory Mapped I/O&#xFF09;&#x6280;&#x672F;&#x5C06;&#x5916;&#x8BBE;&#x6620;&#x5C04;&#x5230;&#x4E00;&#x6BB5;&#x7269;&#x7406;&#x5730;&#x5740;&#xFF0C;&#x8FD9;&#x6837;&#x6211;&#x4EEC;&#x8BBF;&#x95EE;&#x5176;&#x4ED6;&#x5916;&#x8BBE;&#x5C31;&#x548C;&#x8BBF;&#x95EE;&#x7269;&#x7406;&#x5185;&#x5B58;&#x4E00;&#x6837;&#x4E86;&#x3002;</p>
<p>&#x6211;&#x4EEC;&#x5148;&#x4E0D;&#x7BA1;&#x90A3;&#x4E9B;&#x5916;&#x8BBE;&#xFF0C;&#x6765;&#x770B;&#x7269;&#x7406;&#x5185;&#x5B58;&#x3002;</p>
<h3 id="&#x7269;&#x7406;&#x5185;&#x5B58;&#x63A2;&#x6D4B;">&#x7269;&#x7406;&#x5185;&#x5B58;&#x63A2;&#x6D4B;</h3>
<p>&#x64CD;&#x4F5C;&#x7CFB;&#x7EDF;&#x600E;&#x6837;&#x77E5;&#x9053;&#x7269;&#x7406;&#x5185;&#x5B58;&#x6240;&#x5728;&#x7684;&#x90A3;&#x6BB5;&#x7269;&#x7406;&#x5730;&#x5740;&#x5462;&#xFF1F;&#x5728; RISC-V &#x4E2D;&#xFF0C;&#x8FD9;&#x4E2A;&#x4E00;&#x822C;&#x662F;&#x7531; bootloader&#xFF0C;&#x5373; OpenSBI &#x56FA;&#x4EF6;&#x6765;&#x5B8C;&#x6210;&#x7684;&#x3002;&#x5B83;&#x6765;&#x5B8C;&#x6210;&#x5BF9;&#x4E8E;&#x5305;&#x62EC;&#x7269;&#x7406;&#x5185;&#x5B58;&#x5728;&#x5185;&#x7684;&#x5404;&#x5916;&#x8BBE;&#x7684;&#x626B;&#x63CF;&#xFF0C;&#x5C06;&#x626B;&#x63CF;&#x7ED3;&#x679C;&#x4EE5; DTB&#xFF08;Device Tree Blob&#xFF09;&#x7684;&#x683C;&#x5F0F;&#x4FDD;&#x5B58;&#x5728;&#x7269;&#x7406;&#x5185;&#x5B58;&#x4E2D;&#x7684;&#x67D0;&#x4E2A;&#x5730;&#x65B9;&#x3002;&#x968F;&#x540E; OpenSBI &#x56FA;&#x4EF6;&#x4F1A;&#x5C06;&#x5176;&#x5730;&#x5740;&#x4FDD;&#x5B58;&#x5728; <code>a1</code> &#x5BC4;&#x5B58;&#x5668;&#x4E2D;&#xFF0C;&#x7ED9;&#x6211;&#x4EEC;&#x4F7F;&#x7528;&#x3002;</p>
<p>&#x8FD9;&#x4E2A;&#x626B;&#x63CF;&#x7ED3;&#x679C;&#x63CF;&#x8FF0;&#x4E86;&#x6240;&#x6709;&#x5916;&#x8BBE;&#x7684;&#x4FE1;&#x606F;&#xFF0C;&#x5F53;&#x4E2D;&#x4E5F;&#x5305;&#x62EC; QEMU &#x6A21;&#x62DF;&#x7684; RISC-V Virt &#x8BA1;&#x7B97;&#x673A;&#x4E2D;&#x7684;&#x7269;&#x7406;&#x5185;&#x5B58;&#x3002;</p>
<blockquote>
<p><strong>[info] QEMU &#x6A21;&#x62DF;&#x7684; RISC-V Virt &#x8BA1;&#x7B97;&#x673A;&#x4E2D;&#x7684;&#x7269;&#x7406;&#x5185;&#x5B58;</strong></p>
<p>&#x901A;&#x8FC7;&#x67E5;&#x770B; QEMU &#x4EE3;&#x7801;&#x4E2D; <a href="https://github.com/qemu/qemu/blob/master/hw/riscv/virt.c" target="_blank"><code>hw/riscv/virt.c</code></a> &#x7684; <code>virt_memmap[]</code> &#x7684;&#x5B9A;&#x4E49;&#xFF0C;&#x53EF;&#x4EE5;&#x4E86;&#x89E3;&#x5230; QEMU &#x6A21;&#x62DF;&#x7684; RISC-V Virt &#x8BA1;&#x7B97;&#x673A;&#x7684;&#x8BE6;&#x7EC6;&#x7269;&#x7406;&#x5185;&#x5B58;&#x5E03;&#x5C40;&#x3002;&#x53EF;&#x4EE5;&#x770B;&#x5230;&#xFF0C;&#x6574;&#x4E2A;&#x7269;&#x7406;&#x5185;&#x5B58;&#x4E2D;&#x6709;&#x4E0D;&#x5C11;&#x5185;&#x5B58;&#x7A7A;&#x6D1E;&#xFF08;&#x5373;&#x542B;&#x4E49;&#x4E3A; unmapped &#x7684;&#x5730;&#x5740;&#x7A7A;&#x95F4;&#xFF09;&#xFF0C;&#x4E5F;&#x6709;&#x5F88;&#x591A;&#x5916;&#x8BBE;&#x7279;&#x5B9A;&#x7684;&#x5730;&#x5740;&#x7A7A;&#x95F4;&#xFF0C;&#x73B0;&#x5728;&#x6211;&#x4EEC;&#x770B;&#x4E0D;&#x61C2;&#x6CA1;&#x6709;&#x5173;&#x7CFB;&#xFF0C;&#x540E;&#x9762;&#x4F1A;&#x6162;&#x6162;&#x6D89;&#x53CA;&#x5230;&#x3002;&#x76EE;&#x524D;&#x53EA;&#x9700;&#x5173;&#x5FC3;&#x6700;&#x540E;&#x4E00;&#x5757;&#x542B;&#x4E49;&#x4E3A; DRAM &#x7684;&#x5730;&#x5740;&#x7A7A;&#x95F4;&#xFF0C;&#x8FD9;&#x5C31;&#x662F; OS &#x5C06;&#x8981;&#x7BA1;&#x7406;&#x7684; 128 MB &#x7684;&#x5185;&#x5B58;&#x7A7A;&#x95F4;&#x3002;</p>
<table>
<thead>
<tr>
<th style="text-align:center">&#x8D77;&#x59CB;&#x5730;&#x5740;</th>
<th style="text-align:center">&#x7EC8;&#x6B62;&#x5730;&#x5740;</th>
<th style="text-align:left">&#x542B;&#x4E49;</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:center">0x0</td>
<td style="text-align:center">0x100</td>
<td style="text-align:left">QEMU VIRT_DEBUG</td>
</tr>
<tr>
<td style="text-align:center">0x100</td>
<td style="text-align:center">0x1000</td>
<td style="text-align:left">unmapped</td>
</tr>
<tr>
<td style="text-align:center">0x1000</td>
<td style="text-align:center">0x12000</td>
<td style="text-align:left">QEMU MROM</td>
</tr>
<tr>
<td style="text-align:center">0x12000</td>
<td style="text-align:center">0x100000</td>
<td style="text-align:left">unmapped</td>
</tr>
<tr>
<td style="text-align:center">0x100000</td>
<td style="text-align:center">0x101000</td>
<td style="text-align:left">QEMU VIRT_TEST</td>
</tr>
<tr>
<td style="text-align:center">0x101000</td>
<td style="text-align:center">0x2000000</td>
<td style="text-align:left">unmapped</td>
</tr>
<tr>
<td style="text-align:center">0x2000000</td>
<td style="text-align:center">0x2010000</td>
<td style="text-align:left">QEMU VIRT_CLINT</td>
</tr>
<tr>
<td style="text-align:center">0x2010000</td>
<td style="text-align:center">0x3000000</td>
<td style="text-align:left">unmapped</td>
</tr>
<tr>
<td style="text-align:center">0x3000000</td>
<td style="text-align:center">0x3010000</td>
<td style="text-align:left">QEMU VIRT_PCIE_PIO</td>
</tr>
<tr>
<td style="text-align:center">0x3010000</td>
<td style="text-align:center">0xc000000</td>
<td style="text-align:left">unmapped</td>
</tr>
<tr>
<td style="text-align:center">0xc000000</td>
<td style="text-align:center">0x10000000</td>
<td style="text-align:left">QEMU VIRT_PLIC</td>
</tr>
<tr>
<td style="text-align:center">0x10000000</td>
<td style="text-align:center">0x10000100</td>
<td style="text-align:left">QEMU VIRT_UART0</td>
</tr>
<tr>
<td style="text-align:center">0x10000100</td>
<td style="text-align:center">0x10001000</td>
<td style="text-align:left">unmapped</td>
</tr>
<tr>
<td style="text-align:center">0x10001000</td>
<td style="text-align:center">0x10002000</td>
<td style="text-align:left">QEMU VIRT_VIRTIO</td>
</tr>
<tr>
<td style="text-align:center">0x10002000</td>
<td style="text-align:center">0x20000000</td>
<td style="text-align:left">unmapped</td>
</tr>
<tr>
<td style="text-align:center">0x20000000</td>
<td style="text-align:center">0x24000000</td>
<td style="text-align:left">QEMU VIRT_FLASH</td>
</tr>
<tr>
<td style="text-align:center">0x24000000</td>
<td style="text-align:center">0x30000000</td>
<td style="text-align:left">unmapped</td>
</tr>
<tr>
<td style="text-align:center">0x30000000</td>
<td style="text-align:center">0x40000000</td>
<td style="text-align:left">QEMU VIRT_PCIE_ECAM</td>
</tr>
<tr>
<td style="text-align:center">0x40000000</td>
<td style="text-align:center">0x80000000</td>
<td style="text-align:left">QEMU VIRT_PCIE_MMIO</td>
</tr>
<tr>
<td style="text-align:center">0x80000000</td>
<td style="text-align:center">0x88000000</td>
<td style="text-align:left">DRAM &#x7F3A;&#x7701; 128MB&#xFF0C;&#x5927;&#x5C0F;&#x53EF;&#x914D;&#x7F6E;</td>
</tr>
</tbody>
</table>
</blockquote>
<p>&#x4E0D;&#x8FC7;&#x4E3A;&#x4E86;&#x7B80;&#x5355;&#x8D77;&#x89C1;&#xFF0C;&#x6211;&#x4EEC;&#x5E76;&#x4E0D;&#x6253;&#x7B97;&#x81EA;&#x5DF1;&#x53BB;&#x89E3;&#x6790;&#x8FD9;&#x4E2A;&#x7ED3;&#x679C;&#x3002;&#x56E0;&#x4E3A;&#x6211;&#x4EEC;&#x77E5;&#x9053;&#xFF0C;QEMU &#x89C4;&#x5B9A;&#x7684; DRAM &#x7269;&#x7406;&#x5185;&#x5B58;&#x7684;&#x8D77;&#x59CB;&#x7269;&#x7406;&#x5730;&#x5740;&#x4E3A; 0x80000000 &#x3002;&#x800C;&#x5728; QEMU &#x4E2D;&#xFF0C;&#x53EF;&#x4EE5;&#x4F7F;&#x7528; <code>-m</code> &#x6307;&#x5B9A; RAM &#x7684;&#x5927;&#x5C0F;&#xFF0C;&#x9ED8;&#x8BA4;&#x662F; 128 MB &#x3002;&#x56E0;&#x6B64;&#xFF0C;&#x9ED8;&#x8BA4;&#x7684; DRAM &#x7269;&#x7406;&#x5185;&#x5B58;&#x5730;&#x5740;&#x8303;&#x56F4;&#x5C31;&#x662F; [0x80000000, 0x88000000)&#x3002;</p>
<p>&#x56E0;&#x4E3A;&#x540E;&#x9762;&#x8FD8;&#x4F1A;&#x6D89;&#x53CA;&#x5230;&#x865A;&#x62DF;&#x5730;&#x5740;&#x3001;&#x7269;&#x7406;&#x9875;&#x548C;&#x865A;&#x62DF;&#x9875;&#x9762;&#x7684;&#x6982;&#x5FF5;&#xFF0C;&#x4E3A;&#x4E86;&#x8FDB;&#x4E00;&#x6B65;&#x533A;&#x5206;&#x800C;&#x4E0D;&#x662F;&#x7B80;&#x5355;&#x7684;&#x53EA;&#x662F;&#x4F7F;&#x7528; <code>usize</code> &#x7C7B;&#x578B;&#x6765;&#x5B58;&#x50A8;&#xFF0C;&#x6211;&#x4EEC;&#x9996;&#x5148;&#x5EFA;&#x7ACB;&#x4E00;&#x4E2A; <code>PhysicalAddress</code> &#x7684;&#x7C7B;&#xFF0C;&#x7136;&#x540E;&#x5BF9;&#x5176;&#x5B9E;&#x73B0;&#x4E00;&#x7CFB;&#x5217;&#x7684; <code>usize</code> &#x7684;&#x52A0;&#x3001;&#x51CF;&#x548C;&#x8F93;&#x51FA;&#x7B49;&#x7B49;&#x64CD;&#x4F5C;&#xFF0C;&#x7531;&#x4E8E;&#x8FD9;&#x90E8;&#x5206;&#x5B9E;&#x73B0;&#x504F;&#x5411;&#x4E8E; Rust &#x8BED;&#x6CD5;&#x800C;&#x975E; OS&#xFF0C;&#x8FD9;&#x91CC;&#x4E0D;&#x8D34;&#x51FA;&#x4EE3;&#x7801;&#xFF0C;&#x8BF7;&#x53C2;&#x8003; <code>os/src/memory/address.rs</code> &#x6587;&#x4EF6;&#x3002;</p>
<p>&#x7136;&#x540E;&#xFF0C;&#x6211;&#x4EEC;&#x76F4;&#x63A5;&#x5C06; DRAM &#x7269;&#x7406;&#x5185;&#x5B58;&#x7ED3;&#x675F;&#x5730;&#x5740;&#x786C;&#x7F16;&#x7801;&#x5230;&#x5185;&#x6838;&#x4E2D;&#xFF0C;&#x540C;&#x65F6;&#x56E0;&#x4E3A;&#x6211;&#x4EEC;&#x64CD;&#x4F5C;&#x7CFB;&#x7EDF;&#x672C;&#x8EAB;&#x4E5F;&#x7528;&#x4E86;&#x4E00;&#x90E8;&#x5206;&#x7A7A;&#x95F4;&#xFF0C;&#x6211;&#x4EEC;&#x4E5F;&#x8BB0;&#x5F55;&#x4E0B;&#x64CD;&#x4F5C;&#x7CFB;&#x7EDF;&#x7528;&#x5230;&#x7684;&#x5730;&#x5740;&#x7ED3;&#x5C3E;&#xFF08;&#x5373; linker script &#x4E2D;&#x7684; <code>kernel_end</code>&#xFF09;&#x3002;</p>
<p></p><p class="code-label">os/src/memory/config.rs</p><p></p>
<pre><code class="lang-rust">lazy_static! {
    <span class="hljs-comment">/// &#x5185;&#x6838;&#x4EE3;&#x7801;&#x7ED3;&#x675F;&#x7684;&#x5730;&#x5740;&#xFF0C;&#x5373;&#x53EF;&#x4EE5;&#x7528;&#x6765;&#x5206;&#x914D;&#x7684;&#x5185;&#x5B58;&#x8D77;&#x59CB;&#x5730;&#x5740;</span>
    <span class="hljs-comment">///</span>
    <span class="hljs-comment">/// &#x56E0;&#x4E3A; Rust &#x8BED;&#x8A00;&#x9650;&#x5236;&#xFF0C;&#x6211;&#x4EEC;&#x53EA;&#x80FD;&#x5C06;&#x5176;&#x4F5C;&#x4E3A;&#x4E00;&#x4E2A;&#x8FD0;&#x884C;&#x65F6;&#x6C42;&#x503C;&#x7684; static &#x53D8;&#x91CF;&#xFF0C;&#x800C;&#x4E0D;&#x80FD;&#x4F5C;&#x4E3A; const</span>
    <span class="hljs-keyword">pub</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">ref</span> KERNEL_END_ADDRESS: PhysicalAddress = PhysicalAddress(kernel_end <span class="hljs-keyword">as</span> usize);
}

<span class="hljs-keyword">extern</span> <span class="hljs-string">&quot;C&quot;</span> {
    <span class="hljs-comment">/// &#x7531; `linker.ld` &#x6307;&#x5B9A;&#x7684;&#x5185;&#x6838;&#x4EE3;&#x7801;&#x7ED3;&#x675F;&#x4F4D;&#x7F6E;</span>
    <span class="hljs-comment">///</span>
    <span class="hljs-comment">/// &#x4F5C;&#x4E3A;&#x53D8;&#x91CF;&#x5B58;&#x5728; [`KERNEL_END_ADDRESS`]</span>
    <span class="hljs-function"><span class="hljs-keyword">fn</span> <span class="hljs-title">kernel_end</span></span>();
}
</code></pre>
<p>&#x8FD9;&#x91CC;&#x4F7F;&#x7528;&#x4E86; <code>lazy_static</code> &#x5E93;&#xFF0C;&#x7531;&#x4E8E; Rust &#x8BED;&#x8A00;&#x7684;&#x9650;&#x5236;&#xFF0C;&#x6211;&#x4EEC;&#x80FD;&#x5BF9;&#x7F16;&#x8BD1;&#x65F6; <code>kernel_end</code> &#x505A;&#x4E00;&#x4E2A;&#x6C42;&#x503C;&#x7136;&#x540E;&#x8D4B;&#x503C;&#x5230; <code>KERNEL_END_ADDRESS</code> &#x4E2D;&#xFF1B;&#x6240;&#x4EE5;&#xFF0C;<code>lazy_static!</code> &#x5B8F;&#x5E2E;&#x52A9;&#x6211;&#x4EEC;&#x5728;&#x7B2C;&#x4E00;&#x6B21;&#x4F7F;&#x7528; <code>lazy_static!</code> &#x5B8F;&#x5305;&#x88F9;&#x7684;&#x53D8;&#x91CF;&#x65F6;&#x81EA;&#x52A8;&#x5B8C;&#x6210;&#x8FD9;&#x4E9B;&#x6C42;&#x503C;&#x5DE5;&#x4F5C;&#x3002;</p>
<p>&#x6700;&#x540E;&#xFF0C;&#x6211;&#x4EEC;&#x5728;&#x5404;&#x7EA7;&#x6587;&#x4EF6;&#x4E2D;&#x52A0;&#x5165;&#x6A21;&#x5757;&#x8C03;&#x7528;&#xFF0C;&#x5E76;&#x5728; <code>os/src/main.rs</code> &#x5C1D;&#x8BD5;&#x8F93;&#x51FA;&#x3002;</p>
<p></p><p class="code-label">os/src/main.rs</p><p></p>
<pre><code class="lang-rust"><span class="hljs-comment">/// Rust &#x7684;&#x5165;&#x53E3;&#x51FD;&#x6570;</span>
<span class="hljs-comment">///</span>
<span class="hljs-comment">/// &#x5728; `_start` &#x4E3A;&#x6211;&#x4EEC;&#x8FDB;&#x884C;&#x4E86;&#x4E00;&#x7CFB;&#x5217;&#x51C6;&#x5907;&#x4E4B;&#x540E;&#xFF0C;&#x8FD9;&#x662F;&#x7B2C;&#x4E00;&#x4E2A;&#x88AB;&#x8C03;&#x7528;&#x7684; Rust &#x51FD;&#x6570;</span>
<span class="hljs-meta">#[no_mangle]</span>
<span class="hljs-keyword">pub</span> <span class="hljs-keyword">extern</span> <span class="hljs-string">&quot;C&quot;</span> <span class="hljs-function"><span class="hljs-keyword">fn</span> <span class="hljs-title">rust_main</span></span>() -&gt; ! {
    <span class="hljs-comment">// &#x521D;&#x59CB;&#x5316;&#x5404;&#x79CD;&#x6A21;&#x5757;</span>
    interrupt::init();
    memory::init();

    <span class="hljs-comment">// &#x6CE8;&#x610F;&#x8FD9;&#x91CC;&#x7684; KERNEL_END_ADDRESS &#x4E3A; ref &#x7C7B;&#x578B;&#xFF0C;&#x9700;&#x8981;&#x52A0; *</span>
    <span class="hljs-built_in">println!</span>(<span class="hljs-string">&quot;{}&quot;</span>, *memory::config::KERNEL_END_ADDRESS);

    <span class="hljs-built_in">panic!</span>()
}
</code></pre>
<p>&#x6700;&#x540E;&#x8FD0;&#x884C;&#xFF0C;&#x53EF;&#x4EE5;&#x770B;&#x5230;&#x6210;&#x529F;&#x663E;&#x793A;&#x4E86;&#x6211;&#x4EEC;&#x5185;&#x6838;&#x4F7F;&#x7528;&#x7684;&#x7ED3;&#x5C3E;&#x5730;&#x5740; <code>PhysicalAddress(0x8020b220)</code>&#xFF1B;&#x6CE8;&#x610F;&#x5230;&#x8FD9;&#x91CC;&#xFF0C;&#x4F60;&#x7684;&#x8F93;&#x51FA;&#x53EF;&#x80FD;&#x56E0;&#x4E3A;&#x5B9E;&#x73B0;&#x4E0A;&#x7684;&#x7EC6;&#x8282;&#x5E76;&#x4E0D;&#x5B8C;&#x5168;&#x4E00;&#x6837;&#x3002;
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